Insert on the striking surface of a golf club head



FIG. 1 is a perspective view of an insert on the striking surface of a golf club head of the present invention.

FIG. 2 is a front elevational view thereof; and,

FIG. 3 is a top elevational view thereof.

The broken lines showing portions of the golf club head in FIGS. 1-3 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an insert on the striking surface of a golf club head, as shown and described. 